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Wall-Attached Night Ventilation Combined with Phase Change Material Wallboard in Hot Summer:An Experimental Study on the Thermal Performance

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Journal of Thermal Science 2022年第2期31卷 318-331页

作者： ji wenhui YUAN Yanping LI Yajun YU Min School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China

Night ventilation is regarded as a promising cooling strategy by storing night cooling in the thermal mass of the building.However,night ventilation performance in hot summer is restricted by the climatic limits.In this paper,we propose a new solution as the integration of wall-attached night ventilation(WANV)and phase change material wallboard(PCMW).The principle of the proposed system is to utilize the wall-attached jet ventilation to achieve forced convection and to adopt latent energy storage of PCMW to enlarge the energy storage density capabilities,and the coupling method is expected to improve the night ventilation performance.Comparative experiments were conducted to evaluate the thermal performance of the hybrid system by evaluating indoor temperature history,thermal comfort time and cooling efficiency.Due to the high thermal energy storage density capability of PCMW,it was found that the presence of PCMW has a negative influence on night cooling efficiency but still has a positive influence on the overall cooling effect.The proposed WANV combined with the PCMW system significantly increased the temperature decrease of room air and west wall inside surface during one hour's night ventilation by 94.97%and 67.74%,respectively,and reached an extension of 38.42%of indoor thermal comfort time.The results highlight the potential of WANV integration of PCMW to improve the thermal performance of night ventilation.

关键词： night ventilation wall-attached jet ventilation phase change material wallboard thermal performance

A Current Perspective on the Renewable Energy Hydrogen Production Process

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Journal of Thermal Science 2023年第2期32卷 542-596页

作者： ZHOU jinzhi ji wenhui CAO Xiaoling HE Wei FAN jianhua YUAN Yanping School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China Department of Building Environment and Equipment Hefei University of TechnologyHefei 230009China Department of Civil Engineering Technical University of DenmarkBrovej 118Kgs.Lyngby DK 2800Denmark

Hydrogen is a type of clean energy which has the potential to replace the fossil energy for transportation,domestic and industrial applications.To expand the hydrogen production method and reduce the consumption of fossil energy,technologies of using renewable energy to generate hydrogen have been developed widely.Due to the advantages of widespread distribution and various hydrogen production methods,most of the research or review works focus on the solar and biomass energy hydrogen production systems.To achieve a comprehensive acknowledge on the development state of current renewable energy hydrogen production technology,a review on hydrogen production systems driven by solar,wind,biomass,geothermal,ocean and hydropower energy has been presented.The reaction process,energy efficiency,exergy efficiency,hydrogen production rate,economic and environmental performance of these systems have been evaluated.Based on the analysis of these different systems,the challenge and prospects of them are also analyzed.

关键词： hydrogen production renewable energy yield rate energy performance economic and environmental performance

Flue Gas Water Recovery by Indirect Cooling Technology for Large-Scale Applications: A Review

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Journal of Thermal Science 2020年第5期29卷 1223-1241页

作者： ZHONG Wei ji wenhui CAO Xiaoling YUAN Yanping School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China

With social development and economic enhancement,energy is facing significant worldwide demand,and fossil fuels are the prime energy sources for various energy systems over past decades.Furthermore,among fuel-consumed applications,power plants are the primary source of energy consumption.There is a lot of waste heat and steam accompanied by the latent heat produced in the exhaust flue gas.Therefore,the latent heat recovery from the flue gas plays an important role in increasing the efficiency of the system and saving water.To recover the heat and mass in power plants,three primary methods are proposed to condense the vapor based on previous studies:(1)flue gas condensation technology,(2)liquid desiccant-based dehydration(LDD)technology and(3)membrane technology.This paper mainly reviews and summaries the indirect cooling technology in flue gas condensation technology.The numerical simulation and theory of flue gas condensation are introduced.Different heat exchanger types and conducted experiments are also summarized.The performance of the indirect cooling technology is affected not only by its own configuration and design but also by the flue gas inlet temperature,velocity,water vapor mass fraction,etc.The major concerns and outlook of practical applications for further study are attributed to the heat exchanger size and cost,acid corrosion,ash accumulation in flue gas,etc.

关键词： flue gas condensation water recovery heat exchanger power plants

A Review on the Heat Pipe Photovoltaic/Thermal(PV/T)System

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Journal of Thermal Science 2021年第5期30卷 1469-1490页

作者： ZHOU jinzhi ZHONG Wei WU Dan YUAN Yanping ji wenhui HE Wei School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China School of Architecture and Design Southwest Jiaotong UniversityChengdu 610031China Department of Building Environment and Equipment Hefei University of TechnologyHefei 230009China

The Photovoltaic/thermal(PV/T)system combines the conventional PV panel with solar collector into one integrated system,which could achieve the function of generating power and providing thermal energy at the same time.Recently,it has become the most promising solar system for building applications.Most of the PV/T systems use water as the coolant,which could cause freezing problem in winter.To overcome this problem,the heat pipe PV/T system is developed to provide electrical and thermal energy stably without the seasonal barrier.Although some published review works have involved this type of PV/T system,they just stated a simple introduction on it,acting as a small part of their works.This paper focuses on the heat pipe PV/T system independently and provides a comprehensive and in-depth analysis of its performance.Firstly,the structure and operational principles of the heat pipe PV/T module and system are introduced concisely.Then the features and performance of different types of heat pipe PV/T systems,i.e.,integral heat pipe,loop heat pipe,and pulsating heat pipe PV/T system,are presented and analyzed.This is followed by the review on the performance of the systems which combine heat pipe PV/T module and other devices.Finally,the research gaps in this field are identified,and some future research trends and directions are recommended.

关键词： heat pipe PV/T operating principle different types energy and exergy performance

基于弛豫时间分布和有限元模拟的环氧涂层渗水行为研究

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中国腐蚀与防护学报 2024年第2期44卷 489-496页

作者：韩东晓纪文会王通王巍北京航天新立科技有限公司北京100039 中国海洋大学材料科学与工程学院青岛266100

采用弛豫时间分布(DRT)技术和有限元模拟方法,从微观电化学角度分析研究了环氧涂层的渗水行为过程。结果表明:环氧涂层的渗水过程分为3个阶段:初始阶段、饱和阶段和失效阶段。3个阶段中,涂层内部水和腐蚀性介质的含量不同,会严重影响涂... 详细信息

采用弛豫时间分布(DRT)技术和有限元模拟方法,从微观电化学角度分析研究了环氧涂层的渗水行为过程。结果表明:环氧涂层的渗水过程分为3个阶段:初始阶段、饱和阶段和失效阶段。3个阶段中,涂层内部水和腐蚀性介质的含量不同,会严重影响涂层的电容变化。本文为有机防护涂层的机理研究提供了一种新的综合分析方法。

关键词：环氧涂层渗水弛豫时间分布有限元模拟腐蚀机理

排风口位置对竖壁贴附射流夜间通风降温效果影响的分析

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制冷与空调（四川） 2024年第1期38卷 1-9页

作者：季文慧李亚军西南交通大学机械工程学院成都610031

针对成都地区气候特征,开展排风口位置对竖壁贴附射流夜间通风降温效果的分析。选取夏季典型日气象参数进行数值模拟,针对s/b=2,送风速度为4m/s,分析上部排风和下部排风对室内速度场和温度场的影响。上排风和下排风对竖壁贴附区速度场... 详细信息

针对成都地区气候特征,开展排风口位置对竖壁贴附射流夜间通风降温效果的分析。选取夏季典型日气象参数进行数值模拟,针对s/b=2,送风速度为4m/s,分析上部排风和下部排风对室内速度场和温度场的影响。上排风和下排风对竖壁贴附区速度场无明显影响,但是下排风情况下水平贴附区射流主体性保持较好,水平空气湖区速度较大。上排风模式下射流沿着壁面继续向上“攀附”一段距离,对贴附墙体降温效果更好。

关键词：贴壁射流夜间通风排风口位置降温效率

Identification of immunoreactive proteins of Brucella melitensis by immunoproteomics

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中国科学：生命科学英文版 2011年第9期54卷 880-887页

作者： ZHAO ZhongPeng YAN Fang ji wenhui LUO DeYan LIU Xin XING Li DUAN YueQiang YANG PengHui SHI XiuMin LI Zhong WANG XiLiang State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and Epidemiology Beijing 100071 China College of Animal Science and Veterinary Medicine Shanxi Agricultural University Taigu 030801 China

Infection with Brucella causes brucellosis, a chronic disease in humans, which induces abortion and sterility in livestock. Among the different Brucella species, Brucella melitensis is considered the most virulent and is the predominant species associated with outbreaks in China. To date, no safe human vaccine is available against Brucella infection. The currently used live vaccines against Brucella in livestock induce antibodies that interfere with the diagnosis of field infection in vaccinated animals, which is harmful to eradication programs. However, there is as yet no complete profile of immunogenic proteins of B. melitensis. Towards the development of a safer, equally efficacious, and field infection-distinguishable vaccine, we used immunoproteomics to identify novel candidate immunogenic proteins from B. melitensis M5. Eighty-eight immunoreactive protein spots from B. melitensis M5 were identified by Western blotting and were assigned to sixty-one proteins by mass spectrometry, including many new immunoreactive proteins such as elongation factor G, F0F1 ATP synthase subunit beta, and OMP1. These provide many candidate immunoreactive proteins for vaccine development.

关键词：布鲁氏杆菌蛋白鉴定免疫反应布鲁氏菌感染接种疫苗免疫蛋白布氏杆菌病 beta版

基于双哑变量模型预测透光抚育强度对次生林内红松生长的影响

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应用生态学报 2024年第6期35卷 1463-1473页

作者：郝鑫海牟长城崔雅如姬文慧许文赵海明东北林业大学森林生态系统可持续经营教育部重点实验室哈尔滨150040 吉林省白河林业局吉林延边133613

“栽针保阔”是恢复我国东北阔叶红松林的有效途径,透光抚育能促进冠下红松生长并加快演替进程,但目前有关透光抚育如何影响次生林内红松生长过程仍不清楚。以长白山“栽针保阔”红松林为对象,构建含双哑变量(透光抚育强度和林木分级)... 详细信息

“栽针保阔”是恢复我国东北阔叶红松林的有效途径,透光抚育能促进冠下红松生长并加快演替进程,但目前有关透光抚育如何影响次生林内红松生长过程仍不清楚。以长白山“栽针保阔”红松林为对象,构建含双哑变量(透光抚育强度和林木分级)的红松胸径和树高生长模型来预测不同透光抚育强度[即对照(未透光)、轻度透光抚育(保留上层郁闭度0.6)、中度透光抚育(0.4)、强度透光抚育(0.2)和全透光(伐除全部上层阔叶树)]林分中红松三级木的生长过程,揭示透光抚育强度对林内红松胸径和树高及高径比的影响规律。结果表明:6个基础模型中,Gompertz为红松胸径(R^(2)=0.46)和树高(R^(2)=0.81)最优基础模型,在基础模型中引入透光抚育强度单哑变量、双哑变量后胸径模型的R^(2)分别提高至0.65和0.89,树高模型的R^(2)分别提高至0.84和0.94;双哑变量模型为预测红松生长的最适模型。被压木胸径生长在整个模拟预测期间(树龄0~80年)均随透光抚育强度增大而递增(增幅为145.8%~933.3%),而平均木和优势木在中期(42年)、中后期(60年)呈此规律。在初期(20年)和中期,全透光与强度透光抚育对红松优势木(64.8%~68.5%)、平均木(100.0%~144.2%)和被压木(138.5%~183.9%)树高生长的影响程度相近,中度透光抚育和轻度透光抚育对其影响相近(24.3%~35.1%、56.0%~92.3%和84.6%~103.2%);在中后期(62年)和后期(80年),红松三级木树高生长均随透光抚育强度增大而递增。各透光抚育强度下红松优势木、平均木和被压木的高径比变化幅度依次增大,分别为0.50~0.95、0.64~1.23和0.73~4.33;仅被压木在树龄0~80年随透光抚育强度增大而递减。因此,透光抚育约40年后,其对红松的胸径生长的促进作用减弱而对树高的促进作用却增强,而且高径比提高,故此时为缓解林木竞争,对轻度透光抚育、中度透光抚育的林分应进行二次透光抚育以进一步促进红松生长,而对全透光和强度透光抚育林分应进行间伐。

关键词：哑变量模型透光抚育强度 “栽针保阔”红松林林木分级生长规律

Recent progress in modelling and simulation technologies of energy efficiency and environmental quality in the built environment

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Building Simulation 2022年第7期15卷 1175-1176页

作者： wenhui ji Yanping Yuan Liangliang Sun Xudong Zhao School of Mechanical Engineering Southwest Jiaotong UniversityNo.111North Section 1Second Ring RoadChengdu 610031China University of Hull School Engineering and Computer ScienceKingston Upon Hull HU67RXN HumbersideUK

The International Conference for Global Chinese Academia on Energy and Built Environment(ICCEBE)is a premier international event covering a broad range of topics on clean energy utilization,energy efficiency and environmental quality in the built environment.The conference aims to provide a forum to share cutting-edge achievements in the built environment,and to promote academic collaboration and cooperation among worldwide Chinese scholars.

关键词： energy modelling collaboration